| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] operating for [adj] | 6 |
|
| 2 | has been operating for [adj] | 6 |
|
| 3 | has be operating for [adj] | 6 |
|
| 4 | has [be] operating for [adj] | 6 |
|
| 5 | has [be] operating for [num] | 5 |
|
